An adaptive link layer for heterogeneous multi-radio mobile sensor networks
IEEE Journal on Selected Areas in Communications - Special issue on simple wireless sensor networking solutions
A survey on key management mechanisms for distributed Wireless Sensor Networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
A survey of adaptive services to cope with dynamics in wireless self-organizing networks
ACM Computing Surveys (CSUR)
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Low power radios, such as the CC2420, have been widely popular with recent sensor platforms. This paper explores the potential for energy savings from adding a high-power, high-bandwidth radio to current sensor platforms. High-bandwidth radios consume more power but significantly reduce the time for transmissions. Consequently, they offer net savings in total communication energy when there is enough data to offset wake-up energy overhead. The analysis on energy characteristics of several IEEE 802.11 radios show that a feasible crossover point exists (in terms of data size) after which energy savings are possible. Based on this analysis, we present a bulk data transmission protocol for dual radio systems. The results of simulations and prototype implementation show significant energy savings at the expense of introducing acceptable delay.